The Old Second National Bank of Aurora was designed by George Grant Elmslie in 1924. The Prairie School style of design was, at this point, already a fading trend. Elmslie was nearing the end of his career and began to accept commissions for commercial buildings. Elmslie recruited Emil Settler, John Norton, and Kristian Schneider to assist him with the design.[2]

The bank building was a departure from previous Elmslie designs. Instead of focusing on horizontal patterns, this building attempted to integrate vertical patterns into a Prairie School design. The bank is built with Roman brick on a pink granite foundation. The building is topped with a saddleback roof with red tile. Ten brick columns rise from the foundation to the roof. Only the south side of the building features exterior details and ornaments. The narrow cornice is terra cotta and follows the gable. John Norton painted a three-panel mural of 1830s Aurora on the north side of the building's interior. A red tile floor was intended to resemble a large oriental rug. The building was added to the National Register of Historic Places on May 8, 1979.[2]